<template>
  <div>
    <el-upload
        :action="action"
        :before-upload="beforeAvatarUpload"
        :headers="headers"
        :on-success="handleAvatarSuccess"
        :show-file-list="false"
        class="avatar-uploader"
    >
      <img v-if="value" :src="value" class="avatar"/>
      <i v-else class="el-icon-plus avatar-uploader-icon"></i>
    </el-upload>


  </div>
</template>

<script>
export default {
  props: ['value'],
  watch: {
    value(n) {
      this.imageUrl = n
    }
  },
  computed: {
    action() {
      return '/api/upload/local'
    },
    headers() {
      return {
        Authorization: `Bearer ${window.localStorage.getItem('token')}`,
        'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
      }
    }
  }
  ,
  methods: {
    handleAvatarSuccess(res, file) {
      this.imageUrl = res.path
      this.$emit('input', this.imageUrl)
    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === 'image/jpeg' || file.type === 'image/png' || file.type === 'image/jfif'
      const isLt2M = file.size / 1024 / 1024 < 2
      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG 或 PNG 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!')
      }
      return isJPG && isLt2M
    }
  }
}
</script>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.avatar-uploader .el-upload:hover {
  border-color: #409eff;
}

.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}

.avatar {
  width: auto;
  height: 178px;
  display: block;
}
</style>
